| Optimization of thermal control and corrosion resistance of PEO coatings on 7075 aluminum alloy by frequency alteration | |
| Zhu, Mingyu1,2; Song, Yingwei2; Liu, Zihe1,2; Xu, Dongsheng1; Dong, Kaihui1,2; Han, En-Hou1 | |
| Corresponding Author | Song, Yingwei(ywsong@imr.ac.cn) |
| 2022-09-25 | |
| Source Publication | SURFACE & COATINGS TECHNOLOGY
 |
| ISSN | 0257-8972 |
| Volume | 446Pages:12 |
| Abstract | The coatings with high emissivity and corrosion resistance are prepared successfully on 7075 aluminum alloy by plasma electrolytic oxidation (PEO). The effect of frequencies of 100 Hz, 200 Hz, 400 Hz, and 600 Hz on the microstructure, chemical composition, emissivity and corrosion resistance of the coatings are investigated. The results show that the main chemical composition of PEO coatings includes Al, O, Si, P, and V elements, and the content of different vanadium oxides determines the emissivity of the coatings, that is, the black V2O3 instead of brown V2O5 can greatly enhance the emissivity. Under the action of bipolar pulse, frequency exhibits an opposite effect on the emissivity and corrosion resistance of the PEO coatings. With increasing frequencies, the emissivity of the PEO coatings declines due to the decrease of V2O3 content, while the corrosion resistance is improved due to the decrease of spark discharge intensity to avoid pores and cracks in the coatings. The PEO coating prepared under the frequency of 400 Hz presents the highest infrared emissivity larger than 0.85 and good corrosion resistance. |
| Keyword | Plasma electrolytic oxidation Frequency Aluminum alloys Emissivity Corrosion resistance Thermal control |
| DOI | 10.1016/j.surfcoat.2022.128797 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Materials Science ; Physics |
| WOS Subject | Materials Science, Coatings & Films ; Physics, Applied |
| WOS ID | WOS:000848078900003 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/175065 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Song, Yingwei |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat & Engn, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Zhu, Mingyu,Song, Yingwei,Liu, Zihe,et al. Optimization of thermal control and corrosion resistance of PEO coatings on 7075 aluminum alloy by frequency alteration[J]. SURFACE & COATINGS TECHNOLOGY,2022,446:12. |
| APA | Zhu, Mingyu,Song, Yingwei,Liu, Zihe,Xu, Dongsheng,Dong, Kaihui,&Han, En-Hou.(2022).Optimization of thermal control and corrosion resistance of PEO coatings on 7075 aluminum alloy by frequency alteration.SURFACE & COATINGS TECHNOLOGY,446,12. |
| MLA | Zhu, Mingyu,et al."Optimization of thermal control and corrosion resistance of PEO coatings on 7075 aluminum alloy by frequency alteration".SURFACE & COATINGS TECHNOLOGY 446(2022):12. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment